He got out of the UFO game long ago. I don't know if there is info he hasn't passed off or if he has threatened to reveal their disinfo scheme but they sure like to fuck with him from time to time. Either way, he undoubtedly has something over them that keeps him alive.

A uranium store ain't chopped liver either, that's some pretty far out stuff to be selling.
I can sort of imagine the govt likes to tabs on that type of transaction.
The other thing is the details are sketchy, they could have gone in and taken his records if they suspect terry wrists.